A gravity bong is a simple but effective smoking tool. Because it uses leftover containers and household tools, it costs nothing while allowing you to deeply inhale the smoke. Gravity bongs are easy to assemble for beginners and advanced users alike. To make a gravity bong in ten minutes, line a plastic cap with foil, cut the bottom off a plastic drink container, place it in water, then smoke by pulling the bottle up as you breathe in smoke.

Steps

Part 1

Creating the Bowl

1

Make a hole in the cap. Start by unscrewing the cap from a 2-liter or comparable plastic bottle such as a Gatorade bottle, milk bottle, or fruit juice bottle,. For this, you’ll need a hole punching tool, a drill, a knife, or scissors. Twist the implement until you screw a hole through the center of the cap.[1]

2

Widen the hole to pinky-sized. Continue to cut away the inside of the plastic cap until the hole widens. Pinky-sized is an average size to shoot for. Larger holes will give you quicker draws but use up your smokeable faster.[2]

If you’re going to use a bowl piece, widen the hole until the bowl piece fits.

3

Tear off a square of aluminum foil. Rip off a piece that’s big enough to contain the cap. Include extra length so you have enough foil to use. Place the cap aside for a moment.

Instead of foil, use a socket for a socket wrench, a thimble, or another circular piece of metal that you can use to hold your smoking substance.

The danger from using foil is a common myth, but the foil does not release enough aluminum during smoking to cause harm to you.[3]

4

Mold the aluminum into a bowl. Use your finger as a guide. Hold your finger in the center of the foil, then carefully wrap the foil upwards and around your finger. The bowl will have the shape of your finger and fit inside the cap.[4]

5

Place the foil inside the cap. Pick up the cap and keep it top side up as you push the foil into cap’s hole.. Turn the stuck up ends of the foil down and smooth them against the plastic cap.

6

Poke holes in the foil. Set the cap down and get a hole punching tool. A mechanical pencil or toothpick work well if you don’t have a tool from a hardware store. Poke a couple of holes on the part of the foil over the hole in the cap, about four to six to let enough smoke through. Scatter them about so the foil doesn’t break. If the holes are too big, your substance of choice will fall through.

While sockets and other metal can also use foil, you can line the inside of the socket with metal mesh to create a bowl.

Part 2

Forming the Bong’s Body

1

Cut off the end of the taller bottle. Find the Gatorade or 2-liter bottle. Measure a quarter to halfway up the bottle. Using a knife or scissors, make a cut where you measured. Cut all the way around the bottle. This bottle will hold the smoke.[5]

2

Cut the top off a larger container. A water or milk jug wider than the bottle you already cut works for this purpose. Measure down a quarter or halfway from the top, then cut the bottle the same way as you did the other one.[6]

Instead of a bottle, you can simply use a large container such as a bucket, coffee pot, pitcher, or stopped sink, You won’t have to cut these.

3

Fill the larger container halfway with water. Set the container down and fill it up with tap water. Limit the amount of water so that the container is only half-full. This amount will give you enough gravity to make the bong work without making a mess.

Part 3

Using the Bong

1

Load the bowl. Place your favorite legal smoking material on the foil inside the indentation you made earlier. Do this before you assemble the rest of the bong or else the pressure will make the smokeable fly out.

When picking up the cap, make sure your substance of choice isn’t falling through the holes in the foil.

2

Place the bottle in the water. Pick up the top part of the Gatorade or 2-liter bottle you cut earlier and move it into the water. If your water container is big, you may need to hold onto it. Retrieve the cap with the bowl and screw it onto the bottle.

3

Light the substance while pulling up the bottle. Hold the bottle down as you ready your lighter. Light up your bowl. As you light it, slowly pull the bottle upwards with your other hand. You should notice milky smoke filling the bottle. Make sure you don’t pull the bottle out of the water.[7]

4

Unscrew the cap and smoke. Once smoke has filled the bottle, it is ready for use. Unscrew the cap. To smoke, place your lips around the bottle and push down. The smoke will easily shoot out.[8]

Community Q&A

It does. It may only give you a single hit at a time, but it will give you a lot of smoke concentrated inside the bottle. In addition, all you have to do is open your mouth and that smoke will go deep into your lungs. In fact coughing is a common occurrence when using a gravity bong because of how much you take in at a time.

It's fine to push down all the way. As long as the bottom of the bottle is open, water will still get in. It's better to push down so you can give the smoke time to fill the bottle as you pull it back up. Just make sure the top of the bottle is above the water.

That is a myth. Although aluminum fumes are released, it is not nearly enough to hurt you. Aluminum has a melting point of over 1200°C and for the little bit you have the flame over the substance, you will be fine.

Tips

Gatorade bottles work better because they are thicker and more sturdy than a standard 2-liter bottle. Also, the cap is wider, allowing you to make a bigger bowl that is easier to use.

Instead of tin foil, you can use a socket or bowl piece for the bowl. Foil can change the taste of your substance and holds onto smells much longer.

If you find yourself burning your finger after lighting the bowl, poke a small hole high on the side of the bottle to use for sucking up smoke. Cover the hole with your finger as it fills with smoke.

If you don’t want to cut a bottle, make a waterfall bong by poking holes in the bottom of the smaller bottle. Place the bottle in the water. Wait for it to fill up, then place and light the cap. Pull the bottle out to fill it with smoke.

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"This was a very helpful and descriptive set of instructions that was fairly easy to follow. I did everything as it said and mine turned out great. Thank you for writing this and putting pictures to help explain."..." more